Abstract: A tool changer formed by a power assisted draw bar to obtain and lock, as well as release and expel, standard tapered tool holders used with machine tools. Two components, a collet cylinder and a flared stem, together comprise the locking mechanism and protrude through the unmodified spindle cylinder of a commercially available machine tool. The powered actuator assembly, which can separately translate these components, is mounted on top of the machine tool's power head.